As for the idea of a migration, are any primates known to migrate? Humans may follow migratory game or seasonal rains (mostly for agriculture), but that’s intentional, not instinctive, behavior, and I don’t see much potential for a parallel with Bigfoot.

Arizona has the largest stand of ponderosa pines in the country, it’s just that most of them are concentrated in the northern half of the state. I have seen snow on the cactus in the Supers on rare occasions. It’s true the summer is a bitch and will kill you if you are not prepared, but at night and in the winter its a nice place to explore. The most dangerous thing up there are the Dutchman cultists convinced they have figured out the “secret” of the mine’s location. Some of these wackos will kill you.

There is also a river (the Salt) that flows near the base of the mountains and several man made lakes within the area. The gold from the Dutchman’s mine is believed to have been processed at the bottom of Canyon Lake (before it was a lake). So there are patches of riparian habitat throughout the region.

Seriously, these may be the most well-named geographic feature in the United States.